The utility model discloses a coupling is hydrolysised and is cured device of biological oil of pyrolysis calcination four -stage coproduction and white carbon, including hydrolysis tower, drying cabinet, cure rotary drum, spiral pyrolysis apparatus, cross -flow and remove parts such as a bed calcination device, shell tube condenser. Utilize this device, the rice husk raw materials is at first separated through the biological profit of light, detaches and carries out the drying behind most metallic element, rice husk after the drying is again through curing, gets into the spiral pyrolysis apparatus afterwards and carries out the pyrolysis, and the rice husk of production is burnt to be removed a bed calcination device for the cross -flow fully to burn, obtain the white carbon product that purity is high, the high temperature flue gas heat cascade utilization that produces after the calcination, respectively as the pyrolysis, cure and dry heat source, the utility model discloses cascade utilization the energy that produces of the burnt calcination of rice husk, entire system need not outside heat supply, output and quality that the preliminary treatment has improved the biological oil of pyrolysis are separated and cure to the biological profit of joint light, have also improved the quality and the purity of white carbon.